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United Nations Special Envoy for Global Education Gordon Brown speaks during the Oslo Education Summit "Partnering for education" at Oslo Plaza in Oslo, July 6, 2015. REUTERS/Torstein Boe/NTB Scanpix ATTENTION EDITORS - THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY. IT IS DISTRIBUTED, EXACTLY AS RECEIVED BY REUTERS, AS A SERVICE TO CLIENTS. FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS. NORWAY OUT. NO COMMERCIAL OR EDITORIAL SALES IN NORWAY. NO COMMERCIAL SALES.